Percussive tool.



L. C. BAYLES;

FERCUSSIVE TOOL. APPLICATION mso FEB. a. 19:2.

' Paiwmefi 311m 8, 1915..

ma ma :rEReossIvE -TooL.

intense,

275 all whom it may concern a known that I, LEWIS o; Burt's,

citizen ofthe United States, and resident of Easton, in the county of. Northampton and State of Pennsylvania, have invented a newand} useful Improvement. n. Percussive Tools, of Whieh'the following is a spec1fica;

tion. v The object of this invention is to provide anovel rotation device by meansof which the drill steel may be rotated by both mo ve iston, thereby securing, a substantially continuous rotary movement offlthe steel during, the operation of the tool. fflhe -object of this invention is furthermore to, provide certain novel features'oi' construction-Which will bring the parts'into 1 very ,cornpact andv convenient arrangement and in which the parts may be readily as,-

;-,;percussiv e tool of the piston hammer type with my improved rotation device applied,

thereto, Fig. 2 is a longitudinal central sec tion through the tool, taken inthe plane of the line AA of Fig. 1, Fig. 3 is a trans- ,verse'section taken in the plane of the line B -B'of Fig. 1, and Fig. 4 is a diagrammatic view showing more clearly the con struction of the controlling valve --and thelocation of the passages controlled-thereby. Thework piston is denoted by-1 and the chamber within which it-reciprocates, by12.

The cylinder in which thework piston l isv located, is denoted by 3, its front head by 4,--.

its front head washer by 5,;its backhead by (i,jltS valve chest by 7, its rotation controlling piston chest by 8, and its handle byv 9. 'lhe oscillating rotation controlling piston is denoted by 10 and itscllamber by 11. The controlling valve 12 in the valve chest ,7,.inay be of any well known or. approved form and is arranged to control'l'he reciprocations of the work piston 1 and the rota; ltus herein tion controlling piston "10. shown as of the well known double-Winged type in which one wing controls the admission of motive fluid from the inlet33 to the opposite ends of the work piston chamber 2 and rotation controlling piston chamber 11. through the passages 34, 35, and 36, 37, and

the other wing controls the exhaust from the work piston chamber 2 to the outlet 38, through the passages 39, 40. This rotation Specification bf Letters Patent. Pate ted Applieat ioz i filed February 3, 19172 lscr iai li'o. 675,290.

' nnw s o. nnY-Lns, or nasrron, iennnsvnvniim,;,Ass-IG1\ioR 'ro mennsomenliinn 'oomPAnY, on NEW YoRK, lm y' -noq'nronnrron' on NEW JERSEY.

June 8,1915.

piston 1.0 oscillatesin right line across the tool atiright angles to the i movement of the Work piston 1'.

The shank of the drill steel 13 is fitted t thebore of the chuck 14, which chuck iS I'O? tatably mounted inthe front head This drill steel 13 is arranged in position to' have its rear end struck by the extension15 of the piston 1, which-extension slides through the, front head washer 5 into the enlarged bore 16 of the chuck 14. This chuckis p o, vided with a. spur gear 17 which meshes with pinions 18, 19, carried by the front ends of rotary shafts 20, 2l,which extend longitudinally from front to ,rear of the toolthrough the cylinder 3, washer 5 and Valve chest/7',

into "the t'iont' head trolling piston chest 8.

Ratchetdevers 22, 23, areloosely mounted to rock on the rear ends of the rotary shafts 20, 21, the free ends of which levers are extended into a slot 2% in the oscillating rot-ation piston 10. These levers 22, 23,ar'e pro} 4: rotation convided with ratchet teeth 25, 26, on their back.

ends which are arranged; to be engaged by springpressed ratchets 27, 28, having a sliding interlocked connection. with the shafts 20, 21. 'lhe springs 29', 30 for-holding these; ratchets 27, 28, in engagement with the ratchet levers- 22, 23, are interposed between theratchets 27 28, and washers 31, 32, interlocked with the shafts 20,- 21. ,The interlock: ing engagement with the rear ends of these shafts '21 with the ratchets 27, 28, and washers 31, 32, is provided for, in the pres-- ent instance, by forming therear ends of these shafts angular in cross section and the bores of said ratchcts and washers of a similar shape in cross section.

The direction of the engaging teeth on the ratchets 27, 28,. and the levers 22, 23,=is such that as the rotation controlling pistontlO moves injonedirection, oneshal t 20 will be rotated and when it is movodin the other direction, the other-shaft will bc-i-otatcdhammer type, I do not wish to limit myself to such a tool, but contemplate the use of the invention in connection with percussive tools of any type. I

What I claim is 1. In a percussive tool, a chuck and means for rotating it comprising two shafts 'conated.

4.-. In a percussive tool, a chuck and means for rotating it comprising two shafts, gears connecting the shafts and chuck, a fluid pressure operated piston andclutch connections between the piston and shafts arranged to be alternately operated.

5. In a percussive tool, a chuck and means for rotating it comprising two shaftsex tending longitudinally from front to rear of the tool, driving connections between the chuck and the front ends of the shafts, a piston and driving connections between the piston and the rear ends of the shafts arranged to be alternately operated.

6. In a percussive tool, a chuck and means for rotating it comprising two shafts extending longitudinally from front to rear of the tool, driving connections between the chuck and the front ends of the shafts, a fluid pressure operated piston and driving connections between the piston and the rear ends of the shafts arranged to be alternately operated.

7. In a percussive tool,'a chuck and means for rotating it comprising two rotary shafts extending longitudinally from front to rear of the tool, gears connecting the chuck with the front ends of the shafts, a piston and clutch connections between the piston and the rear ends of the shafts arranged to be alternately operated.

8. In a percussive tool, a chuck and means I for rotating it comprising two rotary shafts extending longitudinally from front to rear of the tool,"gears connecting the chuck with the front ends of the shafts, a fluid pressure operated piston and clutch connections between the piston and the rear ends of the shafts arranged to be alternately operated.

9. In a percussive tool, a chuck and means i for automatically rotating it comprising a shaft, a driving connection between the shaft tween the shaft and the chuck, a fluid pressure operated piston, a rock lever engaged by the piston and a driving connection between said lever and shaft.

11. -In a percussive tool, a chuck and means for 'rotating it comprising two shafts, driving connections between the shafts and chuck, a piston, rock levers engaged by said piston and driving connections between said levers and their respective shafts arranged to be alternately operated.

12. In a percussive tool, a chuck and means for rotating it comprising two shafts, driving connections between the shafts and chuck, a fluid pressure operated piston, rock levers engaged by said piston and driving connections between said levers and their respective shafts arranged to be alternately operated.

13. In a percussive tool, a chuck and means for automatically rotating it comprising a shaft, gears connecting the shaft with the chuck, a rotation controlling piston, a rock lever engaged by said piston and a clutch connection between the rocklever and shaft.

141. In a percussive tool, a chuck and means for automatically rotating it comprising a shaft, gears connecting the shaft with the chuck, a fluid pressure operated rotation controlling piston, a rock lever engaged by said piston and a clutch connection-betweenthe rock lever and shaft.

15. In a percussive tool, a chuck and means for rotating it comprising two shafts, gears connecting the shafts with the chuck, a piston, two rock levers engaged by said piston and clutch connections between the rock levers and their respective shafts arranged to be alternately operated.

16. In a percussive tool, a chuck and means for rotating it comprising two shafts, gears connecting the shafts with 'the chuck, a fluid pressure operated piston, two rock levers engaged by said piston and clutch connections between the rock levers and their respective shafts arranged to be alternately operated.

In testimony, that I claim the fdregoing as my invention, I have signed my name in presence of two witnesses, this first day of 

